JP2000038326A - Shampoo composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a shampoo composition having excellent frothing property, enabling smooth passing of fingers through the hair during shampooing and at the start of rinsing and giving refreshing feeling after shampooing. SOLUTION: This shampoo composition contains (A) an ampholytic polymer electrolyte such as a copolymer of acrylic acid and a dialkyl diallyl ammonium salt and (B) an anionic surfactant having carboxyl group and has a pH of 3.5-5.8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shampoo composition having good lathering, smooth finger passage during hair washing and at the beginning of rinsing, and a refreshing feeling after washing.

[0002]

2. Description of the Related Art A shampoo composition is required to have fingering properties during hair washing and rinsing in order to prevent hair damage and the like, in addition to foaming performance. Usually, a cationic polyelectrolyte is blended with the shampoo composition to improve finger penetration during rinsing, and when combined with an anionic surfactant, a complex thereof is formed and adsorbed on the hair surface. Then, finger passage becomes smooth. However, it lacks the refreshing feeling of washing and has a sticky feeling when dried. Furthermore, since the surface of the hair is coated with the complex, the effect of improving the feel of hair cosmetics such as a rinsing agent and a treatment agent is hardly exhibited.
On the other hand, with a shampoo containing no cationic polymer electrolyte, finger shampooing is extremely poor.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a shampoo composition which has good lathering, smoothness of finger passage during hair washing and at the beginning of rinsing, and excellent refreshing feeling after washing.

[0004]

DISCLOSURE OF THE INVENTION The present inventors have found that a shampoo composition having a specific pH in which an amphoteric polyelectrolyte and an anionic surfactant having a carboxyl group are combined has a good foaming property, and is used during hair washing and rinsing. It was found that the first finger passage was smooth and the refreshing feeling after washing was excellent.

That is, the present invention provides a shampoo composition containing (A) an amphoteric polymer electrolyte and (B) an anionic surfactant having a carboxyl group and having a pH of 3.5 to 5.8. It is.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The amphoteric polymer electrolyte of component (A) used in the present invention includes, for example, a copolymer of acrylic acid and a dialkyldiallylammonium salt, and a copolymer of acrylic acid, acrylamide and a dialkyldiallylammonium salt. Coalescence and the like.

Specifically, a binary copolymer having the structural units (1) and (2) represented by the following formula, and a terpolymer having the structural units (1) and (2) and the structural unit (3) And the like.

[0008]

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Wherein R ¹ and R ² represent an alkyl group having 1 to 5, preferably 1 to 3 carbon atoms, and X ⁻ represents an anion.

[0010] Such copolymers include, for example, Marcoat 280, 295, 3330 (above, Calgon
Commercially available products such as those manufactured by the company. As the component (A),
Particularly, a copolymer of acrylic acid and a dialkyldiallylammonium salt is preferred.

One or more amphoteric polymer electrolytes of component (A) can be used, and the total composition is 0.01 to 10% by weight, preferably 0.1 to 5% by weight, more preferably 0.3 to 2% by weight. It is preferable to mix by weight% in view of the liquid property and the feeling improving effect.

The anionic surfactant of the component (B) used in the present invention needs to have a carboxyl group. Other than this, finger passing during rinsing becomes worse. Specifically, for example, N-acyl amino acid salts such as N-acyl glutamate, N-acyl-β-alanine salt, N-acyl glycine salt; alkyl sulfosuccinate, alkyl amide sulfosuccinate, alkyl polyether sulfosuccinate Sulfosuccinic acid type surfactants such as salts; (amide) ether carboxylic acid type surfactants and the like. Of these, N-acyl amino acid salts, especially N-acyl glutamates and alkyl polyether sulfosuccinates are preferred.

The anionic surfactant of the component (B) comprises 1
More than one kind can be used, and 0.1 to 20% by weight, especially 0.5 to 15% by weight, and more preferably 0.5 to 10% by weight are blended in the whole composition, so that the foaming performance and the fingering at the time of rinsing can be achieved. It is preferred in terms of.

The shampoo composition of the present invention can further contain (C) a betaine-type surfactant, which is preferable from the viewpoint of adjusting the liquid properties and improving the feel. Such betaine-type surfactants are not particularly limited as long as they are used in ordinary shampoo compositions.For example, carbobetaine type, amidobetaine type, sulfobetaine type, amidosulfobetaine type, imidazolinium betaine type, Phosphobetaine type and the like, specifically, fatty acid amidopropyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, alkyldimethylaminoacetic acid betaine, alkylhydroxysulfobetaine and the like .

Among these, fatty acid amidopropyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, and particularly lauric acid amidopropyl betaine are preferred.

One or more betaine-type surfactants can be used, and 0.01 to 20% by weight, particularly 0.3 to 10% by weight, are blended in the whole composition. It is preferable from the viewpoint of improvement effect. Further, it is preferable that the betaine type surfactant is blended in a range of 25 to 45% by weight of the total surfactant.

The shampoo composition of the present invention further comprises components used in ordinary shampoo compositions, for example, surfactants, silicone derivatives, cationic polymers, humectants, viscosity modifiers, fragrances, dyes, ultraviolet rays other than those described above. Absorbent,
Antioxidants, antibacterial agents, preservatives and the like can be appropriately compounded within a range not to impair the effects of the present invention.

The shampoo composition of the present invention can be produced by a conventional method and has a pH of 3.5 to 5.8, preferably a pH of 5 to 5.8.
It is adjusted to. When the pH is higher than 5.8, smooth finger passage is not obtained at the time of hair washing and at the beginning of rinsing, and when the pH is lower than 3.5, foaming becomes poor. Further, the shampoo composition of the present invention can be in a commonly used dosage form such as solid, powder, cream, and liquid.

[0019]

EFFECTS OF THE INVENTION The shampoo composition of the present invention has good lathering, smoothness of finger passage during hair washing and at the start of rinsing, and excellent refreshing feeling after washing.

[0020]

EXAMPLES Example 1 A shampoo composition having the composition shown in Table 1 was produced by a conventional method. The pH was adjusted with citric acid. The resulting shampoo composition was sensory-evaluated by 10 expert panelists for foaming when shampooed, finger passing during hair washing, finger passing at the start of rinsing, and freshness after washing, and the following criteria. Was determined. The results are shown in Table 1.

(Evaluation method) (1) Foaming: A: Eight or more people evaluated that foaming was good. ；: 6 to 7 persons evaluated that foaming was good. Δ: 4 to 5 persons evaluated that foaming was good. X: 3 or less evaluated that foaming was good.

(2) Finger washing at the beginning of rinsing during shampooing: A: Eight or more persons were evaluated as smooth fingers. ；: 6 to 7 persons evaluated that the finger was smooth. Δ: 4 to 5 persons evaluated that the finger was smooth. ×: Three or less persons evaluated that the finger was smooth.

(3) Refreshing feeling after washing: ；: Eight or more persons evaluated that they were refreshing. ；: 6 to 7 persons evaluated that they were refreshing. Δ: 4 to 5 people evaluated that they were refreshing. X: Three or less evaluated that it was refreshing.

[0024]

[Table 1]

Examples 2 to 10 Shampoo compositions having the compositions shown in Tables 2 and 3 were produced by a conventional method. All of the obtained shampoo compositions are excellent in foaming, smooth during finger washing and at the beginning of rinsing,
After the washing, a refreshing feeling was obtained.

[0026]

[Table 2]

[0027]

[Table 3]

Continued on front page F-term (reference) 4C083 AC182 AC562 AC642 AC662 AC692 AC711 AC712 AC782 AC792 AC902 AD071 AD072 AD091 AD092 AD112 AD131 AD212 BB05 CC38 DD23 DD31 EE06 EE07 4H003 AB09 AB31 AD04 AE05 BA01 BA09 BA12 FA15

Claims (4)

[Claims] Claims: 1. A composition comprising (A) an amphoteric polymer electrolyte, and (B) an anionic surfactant having a carboxyl group.
A shampoo composition having a pH of 3.5 to 5.8. 2. The shampoo composition according to claim 1, wherein (A) the amphoteric polymer electrolyte is a copolymer of acrylic acid and a dialkyldiallylammonium salt. 3. The shampoo composition according to claim 1, further comprising (C) a betaine type surfactant. 4. The shampoo composition according to claim 3, comprising (C) a betaine-type surfactant in an amount of 25 to 45% by weight of the total surfactant.